66 Charles Mauzy/Corbis;
68 (T) Charles Mauzy/Corbis;
69 (BR) Charles D. Winters/Photo Researchers, Inc., (TR) Clive Streeter/DK Images;
71 (BR) Chris Mooney/Getty Images;
72 (TR) Charles Thatcher/Getty Images;
73 (BR) Photo(s) by Jim Whitmer;
74 (TR, TC) Michael Cogliantry/Getty Images;
75 (T) Charles Mauzy/Corbis, (B) Zen Shui/SuperStock;
76 Tony Freeman/PhotoEdit, Inc.;
81 (T) Pat Lanza/Photoshot;
84 (B) ©Mlenny Photograhy/Alexander Hafemann/iStock-photo, (T) Charles Mauzy/Corbis;
86 (BL) AP Photo/Chris O'Meara, (TR) JTB MEDIA CREATION, Inc./Alamy;
87 (T) Matthew Stockman/Getty Images;
89 (BR) Dave King/Courtesy of The Science Museum, London/©DK Images, (TR) Steve & Dave Maslowski/Photo Researchers, Inc.;
90 fotosav/Shutterstock;
91 Margo Wright/Courtesty Tinker Take-Off;
98 News & Media Relations, Rice University;
100 (T) News & Media Relations, Rice University;
101 (BR) Clive Streeter/©DK Images, (T) sciencephotos/Alamy;
102 (BL) Clive Streeter/DK Images;
103 (B) moken/Fotolia;
105 (TR) Bettmann/Corbis;
108 (BL) B.O'Kane/Alamy, (T) News & Media Relations, Rice University;
110 (B) ©Joel Arem/Photo Researchers, Inc., (TL) Charles D. Winters/Photo Researchers, Inc., (C) Russell Lappa/Photo Researchers, Inc.;
111 (TR) Science Museum/Science & Society Picture Library;
113 (B) Brian Boggess/Fotolia, (T) News & Media Relations, Rice University;
116 Chris Curtis/Shutterstock;
118 (TL) William Sallaz/Duoma/Corbis;
119 (TR) Jerry Mason/Photo Researchers, Inc.;
120 ©Joel Arem/Photo Researchers, Inc.;
124 adisa/Fotolia;
126 (BL) Ashok Saxena/Alamy, (TR) adisa/Fotolia;
129 (TR) Alan Schein Photography/Corbis, (C) Kenneth Eward/Photo Researchers, Inc.;
130 (B) Pedro Sousa/Alamy, (TR) adisa/Fotolia;
135 (BR) David Parker/Photo Researchers, Inc., (BL) Science Photo Library/Photo Researchers, Inc.;
136 (T) Comstock Images/Getty Images, (B) Jonathan Nourok/PhotoEdit, Inc.;
138 (TR) ©David R. Frazier/Photo Researchers, Inc., Andrew Lambert Photography/Science Source, (TL) ©sciencephotos/Alamy Images, (CR, CL) Charles D. Winters/Photo Researchers, Inc., (TC) Dave King/Courtesy of The Science Museum, London/©DK Images, (CR) Fundamental Photographs, (TRL) Richard Megna/Fundamental Photographs, (TCL) Science Photo Library/Photo Researchers, Inc.;
139 (B) Mike Fiala/Getty Images, (TR) adisa/Fotolia;
140 (TR) Richard Megna/Fundamental Photographs;
141 (L, BL) ©inga spence/Alamy Images, (C) ©Stefano Scata/Getty Images, (R) Gina Sanders/Shutterstock;
142 (TR) ©Michael Ventura/Alamy Images, (BL) Dana White/PhotoEdit, Inc.;
143 (TR) David Nunuk/Science Photo Library/Photo Researchers, Inc.;
144 (TL) Andrew Lambert Photography/Science Source, (TR) Elena Rooraid/PhotoEdit, Inc., (B) Pearson Education/Prentice Hall College;
145 (T) Raymond Gendreau/Getty Images;
147 (TR) ©DK Images, (BR) Martin Brigdale/©DK Images, (BL) Philip Dowell/©DK Images, (CC) Roger Phillips/©DK Images, (CL) Stephen Hayward/©DK Images, (CR) Steve Gorton/©DK Images;
156 George D. Lepp/ Corbis;
158 (TR) George D. Lepp/Corbis, (BL) Horie Corporation;
161 (BR) Arestov Andrew/Fotolia;
162 (TR) ©M. Claye/Jacana Scientific Control/Photo Researchers, Inc.;
163 (TCR) Colin Keates/©DK Images, (TR) Colin Keates/The Natural History Museum, London/©DK Images;
165 (B) CapPui/Shutterstock, (TR) George D. Lepp/Corbis;
166 (TL) Mark M. Lawrence/Corbis;
170 (T) George D. Lepp/Corbis, (BL) Jennifer Cheung;
171 (TR, TL) Thomas Markusen/ Markusen Metal Studios Ltd.;
172 (TL) ©Matthias Kulka/Corbis;
176 (BL) Andrew Syred/Photo Researchers, Inc., (T) George D. Lepp/Corbis;
178 (BC) ©Dave King/Motoring Picture Library. National Motor Museum, Beaulieu/DK Images, (CR) Hulton Archive/Getty Images;
179 (L) Bettmann/Corbis, (CR) George Hall/Corbis, (C) John Carter/Photo Researchers, Inc.;
180 (TL) ©SuperStock/AGE Fotostock, (TR) Paul Conklin/PhotoEdit, Inc.;
181 (T) ©age fotostock/SuperStock;
182 (BL) ©DK Images, (BC) Colin Keates/©DK Images;
183 (TC) ©Clive Streeter/Courtesy of The Science Museum, London/DK Images, (TR) Clive Streeter/©DK Images, (TR) Jan Hinsch/Science Photo Library/Photo Researchers, Inc., (C) Matthew Ward/©DK Images, (BL) Tony Craddock/Photo Researchers, Inc.;
188 (T) Honda, ho/©AP Images;
190 John Warden/ Superstock;
192 John Warden/Superstock;
192 (BL) ©Charles O'Rear/Corbis;
194 (TL) Kovac Mario/Fotolia;
197 John E. Kelly/Getty Images;
199 John Warden/Superstock;
199 (BR) Jason L. Price/Shutterstock;
200 (TL) Tom Pantages;
201 (TR) Don Johnston/Getty Images;
202 (TR) Clive Steeter/©DK Images, (TC, BL) Clive Streeter/©DK Images;
203 (TR) Richard Megna/ Fundamental Photographs;
204 (TL) Charles D. Winter/Photo Researchers, Inc., (B) Richard Megna/Fundamental Photographs;
206 John Warden/Superstock;
206 (BL) Bill Bachmann/PhotoEdit, Inc.;
209 (TR) Richard Megna/Fundamental Photographs;
210 (R) Francis Specker/©AP Images, (BL) Ted Soqui/Getty Images;
211 (BC) Mike Stewart/Corbis, (CR) Paul A. Souders/Corbis, (T) PAUL CROCK/AFP/Getty Images;
212 John Warden/Superstock;
212 (BL) Will Hart;
213 (BR) Steven Martine/©AP Images;
214 (BL) ©DK Images;
216 John Warden/Superstock;
216 (B) David Sailors Photography, (B) David Sailors/Corbis;
218 (B) Edgar Fahs Smith Collection/Rare Book and Manuscript Library, University of Pennsylvania, (T) Getty Images, (TR) UpperCut Images/Alamy;
219 (TR) Ken Graham/Accent Alaska;
226 Robbie Shone /Photo Researchers, Inc.;
228 (T) Robbie Shone /Photo Researchers, Inc., (B) Sea Images/PhotoLibrary Group, Inc.;
229 (TR) Chris Collins/Corbis;
230 (TL) Eric Kamp/PhotoLibrary Group, Inc.;
231 (TR) Annie Griffiths Belt/Corbis;
233 (TR) Dick Makin Imaging;
235 (T) Robbie Shone/Photo Researchers, Inc.;
236 (R) Fundamental Photographs, (TL) Jules Frazier/Getty Images, (C, BL) Richard Megna/ Fundamental Photographs;
237 (BR) Mark Hanauer/Corbis;
238 (BR) Steve Gorton/©DK Images;
239 (TR) Bill Varie/Corbis;
240 (T) Robbie Shone/Photo Researchers, Inc., (B) Russ Lappa;
241 (BR) Paul Silverman/Fundamental Photographs;
242 Charles Gullung/Corbis;
243 (B) Bob Krist/Corbis, (T) PictureNet/Corbis;
244 (BL) James L. Amos/Corbis;
246 (T) Robbie Shone/Photo Researchers, Inc., (B) The Image Works, Inc.;
249 (TR) Denkou Images/Getty Images;
256 (R) Fundamental Photographs, (L, C) Richard Megna/Fundamental Photographs;
260 Arnulf Husmo/Getty Images;
262 (T) Arnulf Husmo/Getty Images, (B) Mark A. Johnson/Corbis;
264 (TL) Javier Larrea Roa/AGE Fotostock;
266 (BL) C. Marvin Lang/University of Wisconsin at Stevens Point, (T) Dmitry Kosterev/Shutterstock, (C) Jupiterimages/Thinkstock;
267 (B) ©David Lyons/ Alamy Images, (T) AnnaC/Fotolia;
268 (TL) Barry Rowland/AGE Fotostock;
269 (T) Spencer Platt/Getty Images;
272 (T) Arnulf Husmo/Getty Images;
273 (BR) Gucio_55/Fotolia;
274 (TR) Hisham Ibrahim/Getty Images;
275 (T) Arnulf Husmo/Getty Images, (B) Digital Vision/Getty Images;
276 (B) ©David Lyons/ Alamy Images, (TC) Andy Crawford/©DK Images, (TR) Michael Conroy/©AP Images, (TL) Michael Pole/Corbis;
277 (B) ©DK Images, (CR) Simon Belcher/ Alamy, (TR) The Advertising Archive;
278 ©Bichon/photocuisine/Corbis;
279 (BL) Stephen Simpson/Getty Images;
280 (L) Andrew Whittuck/DK Images;
281 Scott Camazine/Photo Researchers, Inc., (TL) Yogi, Inc./Corbis;
282 (B) Aldo Torelli/Getty Images, (T) Arnulf Husmo/Getty Images;
283 (TR) Jane Sapinsky/ SuperStock;
284 (TL) Michael P. Gadomski/Photo Researchers, Inc.;
287 (CR) Shannon Fagan/Corbis;
290 CERN/Photo Researchers, Inc.;
292 (BL) ©The Granger Collection, NY, (TR) CERN/Photo Researchers, Inc., (BC) Jean-Loup Charmet/Science Photo Library/Photo Researchers, Inc.;
293 (TR) Francois Gohier/Photo Researchers, Inc.;
296 (TL) Roberto de Gugliemo/Photo Researchers, Inc.;
298 (TR) CERN/Photo Researchers, Inc., (BL) Kenneth Garrett;
301 ©The Trustees of The British Museum;
302 (T) Creatas/©Punchstock;
303 (TR) CERN/Photo Researchers, Inc., (BR) David Lees/Corbis;
304 NASA;
305 (TR) David Parker/Science Photo Library/Photo Researchers, Inc.;
306 (BL) Science Source, (CR) Gustoimages/Science Source;
308 (TR) CERN/Photo Researchers, Inc.;
309 (BR) ©AP Images;
311 (BR) Matthew McVay/Getty Images;
312 (BR) Hulton Archive/Getty Images, (BL) Photo Researchers, Inc., (BC) Physics Today Collection/American Institute of Physics/Photo Researchers, Inc.;
313 (TC, BL) Science Source/Photo Researchers, Inc. (R) Idaho National Laboratory;
314 Patrick Landmann/Photo Researchers, Inc.;
315 (TR) Maximilian Stock Ltd/Science Source;
322 Jon Arnold/Getty Images;
324 (TR) Michael J. Doolittle/The Image Works, Inc., (L) Reuters/Corbis, (BR) Robert Brenner/ PhotoEdit, Inc.;
325 (TR) ©Syracuse Newspapers/Suzanne Dunn/The Image Works, Inc., (BL) Adam Woolfitt/Corbis, (C) urbanlight/Shutterstock, (BR) Lou Jones/Getty Images;
326 ©Duomo/Corbis;
328 (TR) ©Duomo/Corbis, (BL) Tony Freeman/PhotoEdit, Inc.;
329 (T) Pedro Coll/AGE Fotostock;
332 (T) ©Duomo/ Corbis, (B) Dennis O'Clair/Getty Images;
334 (TR) Leonard Lessin/Peter Arnold, Inc., (T) Steve Krongard/Getty Images;
335 (T) Melissa Carroll/iStockphoto;
336 (T) ©Randy Wells/Corbis, (BL) Sharon Green/Corbis;
338 (CR) ©DK Images, (R) Joel W. Rogers/Corbis, (BL) Stephen Oliver/©DK Images;
340 (TR) ESA/CE/EUROCONTROL/Photo Researchers, Inc.;
341 (TL) Cen Lu/AGE Fotostock, (TL) dyoma/Shutterstock, (CR) Niels Poulsen DK/Alamy Images, (TR) Stephen Oliver/©DK Images;
342 (T) ©Duomo/Corbis, (BL) Vico Collective/Alin Dragulin/Getty Images.;
344 (TL) Barnabas Kindersley/©DK Images, (B) Diana Jarvis/DK Images;
345 (TR) Benjamin Rondel/Corbis;
347 (T) Karl Weatherly/ Getty Images, (B) A. T. Willett/Alamy;
355 Bob Martin/Getty Images;
356 (BL) ©AP Images, (TR) Bob Martin/Getty Images;
357 (R, L) George Doyle/Getty Images;
358 (T) Daniel Koebe/Corbis;
361 (TR) James Steinberg/Photo Researchers, Inc., (BR) Nicholas Bergkessel, Jr./Photo Researchers, Inc.;
362 (R) Fundamental Photographs, (TC) Peticolas/Megna/Fundamental